Figure 4
From: Notch fatigue behavior: Metallic glass versus ultra-high strength steel
SEM observations of the fatigue crack propagation paths.
“Staircase-like” crack paths with the formation of shear bands for the notched MG under (a) σmax = 350 MPa and (b) σmax = 500 MPa; (c) straight crack path without shear bands for the smooth MG fatigue sample under σmax = 900 MPa; (d) straight crack path without obvious plastic deformation for the notched UHSS under σmax = 1000 MPa.
